It states in the other thread from info that Rob posted and the actual patch notes that the bike gave an "irregular" level of power which some riders felt was unnatural ans unsafe (unpredictable). So they removed it.
Essentially, if you are in race mode, close to the edge of a cliff, race mode "could" give you more than you expected and out you in a dangerous position.
HEnce in my opinion, this means the firmware update contained a "safety" update and should be mandatory and free.
I'll go grab the link to where they stare this, but rob posted it in the other thread.
Mission control thread page 14
QUOTE
"Accelerometer sensitivity
This parameter is no longer present in Mission Control 1.2 because the "Race" setting may have an effect that was perceived by many drivers as irregular engine support. To prevent this effect, the parameter is now fixed to "Eco".
The following graphics explain the difference between the old setting and the new Infinite Tune options. They also visualize the effects of adjustments on support and peak performance in trail mode."